CBSE > Class 07 > Science | CBSE Board | Homework Help

It is present in our nose and is secreted by its inner lining. It is sticky and slimy when prevents germs and bacteria to enter our respiratory track.

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Amudha Shanmugam 8 years, 2 months ago

It is a solid waste, we dispose in morning

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What is Mucus?

Posted by Shivanshu Lawania 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Divyanshi Kirthi 8 years, 2 months ago

The inner lining of stomach secretes mucous which protects the lining of stomach from the hydrochloric acid which kills the bacteria that enter along with the food

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What is alevoli

Posted by Vivek Singh 8 years, 2 months ago

CBSE > Class 07 > Science

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How plants exchange gases ?

Posted by Devanshi Patra 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Divyanshi Kirthi 8 years, 2 months ago

By stomata present on the surface of leaves

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Taniya Abcd 8 years, 2 months ago

Plants exchange gases through stomata present on the leave..

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What is Black hole????

Posted by Chetan Meena 8 years, 2 months ago

CBSE > Class 07 > Science

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कोशिका क्या है?

Posted by Sunny Yadav 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Sunny Yadav 8 years, 2 months ago

It is a unit of human

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Which materials produce heat energy when electric current is passed through them and why?

Posted by Mayank Kumar 8 years, 2 months ago

CBSE > Class 07 > Science

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What is philm and xylem

Posted by Rekha Tikariya 8 years, 2 months ago

CBSE > Class 07 > Science

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rectilinear propogation

Posted by Arul Murugan 8 years, 2 months ago

CBSE > Class 07 > Science

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What is balance diet

Posted by Prabhjot Kaur 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Basant Pandey 8 years, 2 months ago

When we take a balance amount of nutrients in our diet and be healthy.

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What is the mechanism of heart?

Posted by Sagarika Sharma 8 years, 2 months ago

CBSE > Class 07 > Science

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What is brochioles

Posted by Dhananjay Pande 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Priya Prasaad 8 years, 2 months ago

The branches inside the lungs are called bronchioles

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Priya Prasaad 8 years, 2 months ago

When the brochus(plural bronchi)enters the lungs it splits into several other branches with an inflamed balloon like structure called alveoli

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What is the smallest particle of soil?

Posted by Rashi Ganguly 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Basant Pandey 8 years, 2 months ago

Clay particles have a size of 0.002mm in diameter.

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Priya Prasaad 8 years, 2 months ago

Clayey

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What is adaption in plant and animal

Posted by Arjun Verma 8 years, 2 months ago

CBSE > Class 07 > Science

0 answers

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what do you mean by product

Posted by Rimjhim Kumari Rimjhim Kumari 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Basant Pandey 8 years, 2 months ago

When 2 reactants reacts together the output we get is known as the product.

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Define clay soil

Posted by Alok Raj 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Rimjhim Kumari Rimjhim Kumari 8 years, 2 months ago

If the proportion of a fine particles is relatively higher ,then it is called clay soil

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Animal wool yielding animal

Posted by Komal Sachdeva 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Basant Pandey 8 years, 2 months ago

Sheep

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Difference between convex mirrors and convex lens

Posted by Praharsh Katyan 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Rimjhim Kumari Rimjhim Kumari 8 years, 2 months ago

I mistake it

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Rimjhim Kumari Rimjhim Kumari 8 years, 2 months ago

It is a mirror but it is a lens

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Whai is biosphere

Posted by Chaculi Vaishnavi 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Utkarsh Gupta 8 years, 2 months ago

Biosphere is a narrow zone where land water and air interact with each other to support life

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What is fluid

Posted by Shubham Chaubey 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Nikhil Mohan 8 years, 2 months ago

Convection takes place in fluids (water and gas)

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Joan Mariam Jijo 8 years, 2 months ago

Fluid means liquid substanc Example- blood

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What can be define for urea??

Posted by Eva Kandoth 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Joan Mariam Jijo 8 years, 2 months ago

Urea is a toxic material which can harm are body if not removed time to time by urine

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What is calcium nitret?

Posted by Anshuman Kumar 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Anju Kumari 8 years, 2 months ago

It is an inorganic compound

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What are vein and areries

Posted by Rishabh Rawat 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Joan Mariam Jijo 8 years, 2 months ago

Vein are tube like structures know as blood vessels which carries deoxygenated blood from all parts of body to heart for purification of blood. Arteries are the blood vessels which carries oxygenated blood from heart to all parts of our body

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Anju Kumari 8 years, 2 months ago

Arteries carry blood away from the heart and veins carry blood to the heart

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Scientist who discoverd cell

Posted by Shauryaman Jaiswal 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Anju Kumari 8 years, 2 months ago

It is discovered by Robert hook in 1665

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List two differences between aerobic and anaerobic respiration

Posted by Yugraj Raghuvanshi 4 years, 7 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 4 years, 7 months ago

Aerobic Respiration	Anaerobic Respiration
Oxygen is present when this form of respiration takes place.	Oxygen is absent when this form of respiration takes place.
Gases are exchanged in this form of respiration.	Gases are not exchanged in this form of respiration.
It can be found in the cytoplasm and the mitochondria.	It can be found only in the cytoplasm.
Glucose breaks down into carbon dioxide and water.	Glucose breaks down into ethyl alcohol, carbon dioxide and energy.
All higher organisms such as mammals have this type of respiration.	Lower organisms such as bacteria and yeast use this type. In other organisms, it occurs during heavy activities.